// 
// Copyright(c) 2009 Syntext, Inc. All Rights Reserved.
// Contact: info@syntext.com, http://www.syntext.com
// 
// This file is part of Syntext Serna XML Editor.
// 
// COMMERCIAL USAGE
// Licensees holding valid Syntext Serna commercial licenses may use this file
// in accordance with the Syntext Serna Commercial License Agreement provided
// with the software, or, alternatively, in accorance with the terms contained
// in a written agreement between you and Syntext, Inc.
// 
// GNU GENERAL PUBLIC LICENSE USAGE
// Alternatively, this file may be used under the terms of the GNU General 
// Public License versions 2.0 or 3.0 as published by the Free Software 
// Foundation and appearing in the file LICENSE.GPL included in the packaging 
// of this file. In addition, as a special exception, Syntext, Inc. gives you
// certain additional rights, which are described in the Syntext, Inc. GPL 
// Exception for Syntext Serna Free Edition, included in the file 
// GPL_EXCEPTION.txt in this package.
// 
// You should have received a copy of appropriate licenses along with this 
// package. If not, see <http://www.syntext.com/legal/>. If you are unsure
// which license is appropriate for your use, please contact the sales 
// department at sales@syntext.com.
// 
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
// 
// Copyright (c) 2003 Syntext Inc.
//
// This is a copyrighted commercial software.
// Please see COPYRIGHT file for details.

/** \file
 */

#include "utils_debug.h"
#include "reg_utils.h"
#include <algorithm>
#include <iterator>
#include <iostream>

#ifdef DBG_DEFAULT_TAG
# undef DBG_DEFAULT_TAG
#endif

#define DBG_DEFAULT_TAG UTILS.CONFIG

using namespace std;

const COMMON_NS::DebugOutStream&
operator <<(const COMMON_NS::DebugOutStream& ds, const TCharBuf& tb)
{
    ds.notify();
    copy(tb.begin(), tb.end(), ostreambuf_iterator<char>(ds.get_os()));
    return ds;
}

bool reg_query_value(HKEY root_key, const TCHAR* keyname, const TCHAR* name,
                     TCharBuf& dst)
{
    HKEY key;
    LONG err = RegOpenKeyEx(root_key,           // handle to open key
                            keyname,            // subkey name
                            0,                  // reserved
                            KEY_QUERY_VALUE,    // desired access
                            &key);              // pointer to key
    TCharBuf val;
    if (ERROR_SUCCESS == err) {
        DWORD sz = 64;
        do {
            val.resize(sz / sizeof(val[0]));
            err = RegQueryValueEx(key, name, 0, 0, (BYTE*)&val[0], &sz);
        } while (ERROR_MORE_DATA == err);
        RegCloseKey(key);
        if (err != ERROR_SUCCESS)
            val.clear();
        else
            val.resize(sz);
    }
    DDBG << "reg_query_value: '" << val << "' return code == " << err << endl;
    if (ERROR_SUCCESS == err) {
        dst.swap(val);
        return true;
    }
    return false;
}

